Utilisation of prey by antlion larvae (Neuroptera: Myrmeleontidae) in terms of energy and nutrients.

Abstract:

:Prey utilisation at low prey densities was determined for third instar Cueta sp., Furgella intermedia (Markl) and Palpares annulatus (Stitz) larvae in terms of wet weight, dry weight, energy and nutrients. Prey utilisation was similar to other insects on a wet weight (42-47%), dry weight (46-49%), energetic (40-58%) and nutritive basis (62-79%). Lipids (33-36%) provided energetically the highest contribution of the nutrients ingested. The quantities of water, proteins, nucleic acids, lipids and carbohydrates extracted by the antlion larvae were in proportion to their availability in their prey, the Hodotermes mossambicus larvae. The quantities of nutrients extracted by the antlion larvae at low prey densities were not significantly influenced by the differences in mandible size, antlion body weight or the trapping method (building a pit or not) of the antlion species. It is proposed that a low metabolic rate and the accumulation of fat reserves, and not the extent of prey utilisation, enable P. annulatus larvae to tolerate a 123-d starvation period in which 22.3% of their body weight is lost.

journal_name

J Insect Physiol

authors

De K Van Der Linde TC,Van Der Westhuizen MC,Van Zyl A

doi

10.1016/s0022-1910(97)00020-6

keywords:

subject

Has Abstract

pub_date

1997-07-01 00:00:00

pages

605-613

issue

7

eissn

0022-1910

issn

1879-1611

pii

S0022-1910(97)00020-6

journal_volume

43

pub_type

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